Siemens S5-100U - Technical Description

2 Technical Description
2.1 Programmable Controller Design . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
2.2 Principle of Operation for the Programmable Controller . . . . . . . . . 2 - 3
2.2.1 Functional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3
2.2.2 Mode of Operation for the External I/O Bus . . . . . . . . . . . . . . . . . 2 - 6
EWA 4NEB 812 6120-02